package com.hmdp.utils;


import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


/**
 *  登录拦截器
 */
public class LoginInterceptor implements HandlerInterceptor {


    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//判断是否需要拦截（ThreadLocal中是否有用户）
        if (UserHolder.getUser() == null) {
            //没有，需要拦截，跳转到登录页
            response.setStatus(401);
            return false;
        }
        return true;
        }




}
